Table 1.
Population characteristics (median and range for continuous variables; percentage for categorical variables)
| Variable | N= 6296 |
|---|---|
| Demographic characteristics | |
| Age (years) | 78 (20–108) |
| Sex | |
| Female | 59·2% |
| Male | 40·8% |
| Race | |
| White | 42·2% |
| Black | 36·0% |
| Hispanic | 16·3% |
| Other race | 5·6% |
| Clinical characteristics | |
| DRG weight (2007) | 1·58 (0·51–23·11) |
| Systemic infection or fever during index admission | 40·0% |
| Laboratory values | |
| Albumin (g/dl) | 3·1 (0·7–5·4) |
| White blood cells (k/µl) | 11·5 (0·2–313·2) |
| Haematocrit (%) | 34·0 (9·4–65·0) 138 |
| Sodium (mEq/l) | (95–194) |
| Glucose (mg/dl) | 128 (1–2307) |
| Estimated glomerular filtration rate on admission (ml/min/1·73 m2) | 55·2 (1·67–1362·8) |
| Comorbid disease | |
| Diabetes | 92·8% |
| Congestive heart failure | 40·6% |
| Chronic renal failure | 31·4% |
| Any liver disease | 11·0% |
| Human immunodeficiency virus/AIDS | 3·4% |
| Dementia | 12·9% |
| Cerebrovascular disease | 18·3% |
| Hemiplegia or paraplegia | 5·3% |
| Myocardial infarction | 10·1% |
| Peripheral vascular disease | 12·3% |
| Chronic pulmonary disease | 21·6% |
| Rheumatologic disease | 2·3% |
| Peptic ulcer disease | 3·3% |
| Any malignancy | 12·3% |
| Metastatic solid tumour | 6·8% |